From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1792774515; b=KGpfgwlx9etscuMeD5SvNe02KYVe5elOYg3qcq60sp29kvvrntRNcGUXCJRKrNwMAipa qYOVE4loWSRnaf7NYHfCUv0yYoV4dSAwzaURTbxKv8aUhb7eNxfggIGybI5AK0tCK6LAD 6P1pew+PHDSMGIKUUAV0a9A9vHqews+tUsCw1e6DG9ZQYJJwLGuwk2Lq+BcPMgVgLiUiY pJK1ZYXBvVsZmSZVcS36ppvCp87sIPIa9EiIUi7GDe/exH7lfxm7vvK/IqhryiBURVJtN iGwCMMbDDjJsZx31aSOF7G+prTw1zO0iibcQopCk/Itf8z3e4/sQQWyxLnQapPhXZkw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1792774515; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:User-Agent:X-stable:X-Patchwork-Hint: MIME-Version:Content-Transfer-Encoding; bh=baeDLGoAzf0vg2gFAitpEjCeslbaBgog/I60NAqcajE=; b=RzOlklUolBppl4onBfEOzjMMAwWfl9Oqcp8gd1kB447U1G+YNgfOACzQs/xZ054kpXj1 EXHp3OLR/oHxGnNV1AQF5uMK5og9AEpMCDrkxS3+eS4tGEdSlmOS4jyiugBMPVn+i09q5 wtA31JFve4BTr+PNpC+B1dBYwT+kQN8/mDRUEAo+C9cIxqLQocl8kS1oONf6IjUVzoyJv XFxvF5ItTVEhUUO9+A2CpNt9qqMhhC9dKGBuR8kUamUjkYh/DpbLcWeTPpWZQK1Xzr5Mi UPWP5/c/cCoK5wlvvmRfpq6LxoUqnz7KLbL62MUeFHOVyJzVtKjgdygdI/gv5nm3D2g== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=CUfcYVAu; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D6956606A31D; Fri, 23 Oct 2026 16:55:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=CUfcYVAu Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2A98B1F01825; Fri, 23 Oct 2026 16:55:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1792774514; bh=baeDLGoAzf0vg2gFAitpEjCeslbaBgog/I60NAqcajE=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=CUfcYVAuJYmzkkWNTWnY3GaMSoVwuU2kaE2VwtO6ao2d0iHEd2cD43Sf2KgxSNGHE y4ng1pVv8gP9ekJPdKgu6vNPfreItvMqt7jeixVs3rbZmquGxB475+7MtsFtOWpMV0 s+pE5N2PW5AVvJY6gJBf4wGLgsbioMwtbqib9RNc= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, "Christian Brauner (Amutable)" , Sasha Levin Subject: [PATCH 7.2 066/242] fs: pass flags to copy_fs() Date: Fri, 23 Oct 2026 18:38:28 +0200 Message-ID: <20261023163715.345530918@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261023163713.816071858@linuxfoundation.org> References: <20261023163713.816071858@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore X-Mailing-List: patches@lists.linux.dev List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 7.2-stable review patch. If anyone has any objections, please let me know. ------------------ From: Christian Brauner [ Upstream commit 9cd0df397a119d6b95ad68e2c82b69b4d620694e ] Turn the umh boolean into a flags argument. Idle threads need their own case in copy_fs() as well and that's nicer than a second boolean. No functional changes. Link: https://patch.msgid.link/20261013-work-fs-idle_fs-v1-1-2063d1bcb5aa@kernel.org Signed-off-by: Christian Brauner (Amutable) Stable-dep-of: d2bdb9b61b42 ("fs: let idle threads share init_fs") Signed-off-by: Sasha Levin --- kernel/fork.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) diff --git a/kernel/fork.c b/kernel/fork.c index 2f736fa44798b..92edfd918b74b 100644 --- a/kernel/fork.c +++ b/kernel/fork.c @@ -1618,7 +1618,12 @@ static int copy_exec_state(u64 clone_flags, struct task_struct *tsk) return task_exec_state_copy(tsk); } -static int copy_fs(u64 clone_flags, struct task_struct *tsk, bool umh) +enum copy_fs_flags_t { + COPY_FS_UMH = (1 << 0), +}; + +static int copy_fs(u64 clone_flags, struct task_struct *tsk, + enum copy_fs_flags_t flags) { struct fs_struct *fs; @@ -1628,7 +1633,7 @@ static int copy_fs(u64 clone_flags, struct task_struct *tsk, bool umh) * filesystem state, or be started from a non-initial mount * namespace. */ - if (umh) { + if (flags & COPY_FS_UMH) { if (clone_flags & (CLONE_NEWNS | CLONE_FS)) return -EINVAL; if (current->nsproxy->mnt_ns != &init_mnt_ns) @@ -2298,7 +2303,7 @@ __latent_entropy struct task_struct *copy_process( retval = copy_files(clone_flags, p, args->no_files); if (retval) goto bad_fork_cleanup_semundo; - retval = copy_fs(clone_flags, p, args->umh); + retval = copy_fs(clone_flags, p, args->umh ? COPY_FS_UMH : 0); if (retval) goto bad_fork_cleanup_files; retval = copy_sighand(clone_flags, p); -- 2.53.0